Extrusion

The following comments can be made concerning compound design and the selection of polymer grades for extrusion compounds:

a) For compounds of 25-55 Shore A:

• high Mooney viscosity (oil-extended polymers)
• high oil loading
• medium to high ethylene content
• high ENB content.

b) For compounds of 55-70 Shore A:

• high Mooney viscosity
• medium ethylene content
• medium to high ENB content.

c) For compounds of 70-95 Shore A:

• low Mooney viscosity
• highest ethylene content
• medium degree of unsaturation.

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